Insulation, Radiant and Vapor Barriers - Drive in basement ceiling Vapor barrier

Doityourself.com community forum was created to provide answers to all questions related to home improvement and home repair. Doityourself community can help you find information about how-to topics on small fixes to large remodeling projects. With comprehensive how-to content and expertly moderated community forums DoItYourself.com makes it easy to tackle even the most complex home improvement projects.



PDA
toofer
08-27-07, 01:00 PM
Hi, new here. I'm getting ready to buy a house that has a drive in basement with bedrooms over the garage area. Is it a good idea to put up some sort of vapor barrier to prevent exhaust gasses from reaching the bedrooms? Thanks.

Concretemasonry
08-27-07, 01:17 PM
You should have a vapor barrier on the warm side of the gargare ceiling/first floor. All drywall joints must be taped.

Beyong that, the logical step would be to eliminate the fumes with common sense/ventilation or decreasing the fumes.

Dick
HotinOKC
08-27-07, 08:08 PM
I would for sure put up some spray foam type insulation if there isn't any now. This will prevent heat/cool loss along with the noise of the garage door and vehicles.

I'm learning some things from Holmes on Homes! :)

toofer
08-28-07, 09:00 AM
I guess what I'm asking is, would it help/hurt if I put up a layer of plastic on the bottom side of the floor joists (there is no drywall on the bottom, just insulation in between joists). Just something to keep the fumes from even reaching the bedroom floors.
Ed Imeduc
08-28-07, 09:14 AM
Id sure check code there. Most codes call for a 5/8 drywall in a garage in a home for fire. Also check with your insurance company about this. Like said if you put insulation in therethe V/B side has to go to the floor of the room above. Dont put another V/B on the under side for sure.
toofer
08-28-07, 11:34 AM
So basically the vapor barrier should be on top of the subfloor, under the carpet? Or under the subfloor on top of the floor joists? And if there is none at all, then I'm assuming it's okay to put a vapor barrier on the bottom side of the joists and then drywall over that?
adamplghtg
08-28-07, 06:52 PM
If you do a vapor barrier, it MUST be on the WARM side of the house. DO NOT put it on the GARAGE side or you will have problems. You can drywall the garage ceiling but DO NOT use a vapor barrier.